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Figure 1 | BMC Health Services Research

Figure 1

From: Empirical analysis shows reduced cost data collection may be an efficient method in economic clinical trials

Figure 1

Overview of incomplete cost collection: methods and omitted quarters. Alternative 0: complete cost collection. Alternative 1: extrapolation, omitted quarter 2, replaced by quarter 3. Alternative 2: extrapolation, omitted quarter 3, replaced by quarter 4. Alternative 3: extrapolation, omitted quarters 2 and 3, replaced by quarter 4. Alternative 4: interpolation, omitted quarter 2, replaced by quarters 1 and 3. Alternative 5: interpolation, omitted quarter 3, replaced by quarters 2 and 4. Alternative 6: interpolation, omitted quarters 2 and 3, replaced by quarter 1 and 4.

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